A benign microacinar proliferation occurring exclusively in the verumontanum and adjacent posterior urethra where the ejaculatory ducts and utricle empty into the urethra. Crystalloids and intraluminal mucin are usually absent, but; intraluminal corpora amylacea are often present. The lining epithelium typically consists of bland cuboidal to columnar luminal cells with underlying basal cells. [from
NCI]